What is the result of performing R2→R2−2R1R_2 \to R_2 - 2R_1R2→R2−2R1 on (1326)\begin{pmatrix} 1 & 3 \\ 2 & 6 \end{pmatrix}(1236)?
(1300)\begin{pmatrix} 1 & 3 \\ 0 & 0 \end{pmatrix}(1030)
(1310)\begin{pmatrix} 1 & 3 \\ 1 & 0 \end{pmatrix}(1130)
(1301)\begin{pmatrix} 1 & 3 \\ 0 & 1 \end{pmatrix}(1031)
(0026)\begin{pmatrix} 0 & 0 \\ 2 & 6 \end{pmatrix}(0206)